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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "selector.h"
namespace vespalib {
namespace {
//-----------------------------------------------------------------------------
struct SingleFdHandler {
int my_fd;
bool got_wakeup;
bool got_read;
bool got_write;
SingleFdHandler(int my_fd_in)
: my_fd(my_fd_in), got_wakeup(false), got_read(false), got_write(false) {}
void handle_wakeup() {
got_wakeup = true;
}
void handle_event(int &ctx, bool read, bool write) {
if ((ctx == my_fd) && read) {
got_read = true;
}
if ((ctx == my_fd) && write) {
got_write = true;
}
}
};
} // namespace vespalib::<unnamed>
//-----------------------------------------------------------------------------
SingleFdSelector::SingleFdSelector(int fd)
: _fd(fd),
_selector()
{
_selector.add(_fd, _fd, false, false);
}
SingleFdSelector::~SingleFdSelector()
{
_selector.remove(_fd);
}
bool
SingleFdSelector::wait_readable()
{
_selector.update(_fd, _fd, true, false);
for (;;) {
_selector.poll(-1);
SingleFdHandler handler(_fd);
_selector.dispatch(handler);
if (handler.got_read) {
return true;
}
if (handler.got_wakeup) {
return false;
}
}
}
bool
SingleFdSelector::wait_writable()
{
_selector.update(_fd, _fd, false, true);
for (;;) {
_selector.poll(-1);
SingleFdHandler handler(_fd);
_selector.dispatch(handler);
if (handler.got_write) {
return true;
}
if (handler.got_wakeup) {
return false;
}
}
}
void
SingleFdSelector::wakeup()
{
_selector.wakeup();
}
//-----------------------------------------------------------------------------
} // namespace vespalib
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